Aminoalkylesteralkylpolysiloxanes

ABSTRACT

TO PRODUCE A COPOLYMER CONTAINING   (R-)A-SI(-C(-R&#39;&#39;)2-CH(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COO-(C(-R&#39;&#39;)2)C-Z)-   O((3-A)/2) UNITS AND   -O-(SI(-CH3)2-O)D-     HO-(SI(-CH3)2-O)D-H   IS REACTED WITH A SILANOL STOPPED FLUID OF THE FORMULA, (C(-R&#39;&#39;)2)C-CN   (R-)A-SI(-X)(3-A)-C(-R&#39;&#39;)2-CH(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COO-   (R-)A-SI(-X)(3-A)-H + CATALYST --&gt;   (R&#39;&#39;-)2-C=C(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COO-(C(-R&#39;&#39;)2)C-CN +   CATALYST --&gt;   (R&#39;&#39;-)2-C=C(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COOH + HO-(C(-R&#39;&#39;)2)C-CN +   ARE MADE BY THE FOLLOWING REACTIONS:   (C(-R&#39;&#39;)2)C-CN   (R-)A-SI(-X)(3-A)-C(-R&#39;&#39;)2-CH(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COO-   CYANOALKYLESTERALKYISILANES WITHIN THE SCOPE OF THE FORMULA: BLOCKS. IN THE ABOVE FORMULAS, R IS AN ORGANIC RADICAL, R&#39;&#39; IS AN ORGANIC RADICAL OR HYDROGEN, X IS A HYDROLYZABLE GROUP, Z IS A -CH2-NH2 OR A-CN RADICAL, A HAS A VALUE OF 0 TO 2, B HAS A VALUE OF 0 TO 4, C HAS A VALUE OF ONE TO 5, AND D HAS A VALUE OF 5 TO 500. THE COPOLYMER CONTAINING CYANOALKYLESTERALKYLSILANE UNITS IS USEFUL AS A SOLVENT RESISTANT PROTECTIVE COATING MATERIAL. THE COPOLYMER CONTAINING AMINOALKYLESTERALKYLSILANE UNITS IS THE PRIMARY INGREDIENT OF A DETERGENT RESISTANT CAR POLISH.   AMINOALKYLESTERALKYLSILANES OF THE FORMULA:   (R-)A-SI(-X)(3-A)-C(-R&#39;&#39;)2-CH(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COO-   (C(-R&#39;&#39;)2)C-CH2-NH2   ARE MADE BY HYDROGENATING THE CORRESPONDING NITRILE. A COMPOUND WITHIN THE SCOPE OF THE FORMULA,   (R-)A-SI(-X)(3-A)-C(-R&#39;&#39;)2-CH(-R&#39;&#39;)-(C(-R&#39;&#39;)2)B-COO-   (C(-R&#39;&#39;)2)C-Z

United States Patent 3,558,556 AMINOALKYLESTERALKYLPOLYSILOXANES Abe Berger, Schenectady, and Jalal S. Jtlleel, Albany,

N.Y., assignors to General Electric Company, a corporation of New York No Drawing. Filed July 17, 1968, Ser. No. 745,377 Int. Cl. C08f 11/04 US. Cl. 260-465 10 Claims l m1 Lil.

are made by hydrogenating the corresponding nitrile. A compound within the scope of the formula,

abl irl? is reacted with a silanol stopped fluid of the formula,

catalyst teal.

to produce a copolymer containing CH olirf L IlJd blocks. In the above formulas, R is an organic radical,

R is an organic radical or hydrogen, X is a hydrolyzable group, Z is a units and or a -CN radical, a has a value of 0 to 2, b has a value of 0 to 4, c has a value of one to 5, and d has a value of to 500. The copolymer containing cyanoalkylesteralkylsilane units is useful as a solvent resistant protective coating material. The copolymer containing aminoalkylesteralkylsilane units is the primary ingredient of a detergent resistant car polish.

ice

This invention relates to organosilicon compounds containing cyanoalkylesteralkyl or aminoalkylesteralkyl radicals attached to silicon and to the use of such compounds. Silanes containing cyanoalkoxyallcyl radicals or aminoalkoxyalkyl radicals, the alkoxy radicals of which are unbranched, are known in the art. These silanes are difficult to prepare, expensive and unstable at elevated temperatures. In addition, by-products produced in the synthesis of these prior art silanes and impurities formed during distillation, which by-prod-ucts and impurities can be removed only with the greatest difficulty, tend to mask the desirable properties of this class of silane compounds.

In spite of the existence of these prior art silanes, problems continued to exist in the field of detergent resistant polishes, slip resistant polishes, non-wicking silicone furniture polish, and room temperature vulcanizable silicone compositions which cure rapidly without the formation of corrosive by-products. These problems have now been solved by the compositions of the present invention.

When aminoalkylesteralkyl radicals are present in a polysiloxane used in a polish composition, the result is superior to that which is achieved in the absence of the amine containing radicals and there is also improved gloss. A silane containing aminoalkylesteralkyl radicals, and in addition containing hydrolyzable radicals, when mixed with a silanol-stopped fluid forms a composition which cures upon exposure to atmospheric moisture. This reaction is the basis for an entirely new type of detergent resistant polish, and a new type of room temperature vulcanizable adhesive. The aminoalkylesteralkylsilanes and cyanoalkylesteralkylsilanes of present invention are also useful as glass sizing agents and for inorganic filler treating agents.

The silanes of the present invention fall within the formula,

Copolymers of Formula 1 with a silanol-stopped polydiorganosiloxane contain the structural unit:

recurring or intercondensed with siloxane blocks having the average formula:

Li I

In the above formulas and in the formulas that follow Z is selected from the class consisting of when Z is CN, R can also be selected from the class consisting of halogenated derivatives of the R radicals defined above; R' is a radical selected from the class consisting of hydrogen, lower alkyl radicals; cycloalkyl radicals having 5 to 7 carbon atoms in the ring; further radicals where two R radicals attached to the same carbon atom, taken together with the carbon atom to which they are attached, form a cycloalkyl radical having 5 to 7 carbon atoms in the ring; and when Z is CN, R can also be selected from the class consisting of halogenated derivatives of the above defined R radicals; R" is selected from the class consisting of lower alkyl radicals, cycloalkyl radicals containing from 5 to 7 carbon atoms in the ring, lower alkenyl radicals, mono and binuclear aryl radicals, mononuclear aryl lower alkyl radicals, lower cyanoalkyl radicals, lower aminoalkyl radicals, lower alkoxy radicals, hydrogen and when Z is CN, R" can also be selected from the class consisting of halogenated derivatives of the hydrocarbon R radicals defined above; X is a hydrolyzable radical selected from the class consisting of lower alkoxy radicals, mononuclear aryloxy radicals, lower dialkyl aminoxy radicals and lower dialkyl amino radicals and when Z is a nitrile radical, X in addition to to the above described radicals can be selected from the class comprising halide radicals, isothiocyimato radicals, isonitrile radicals, oximo radicals, lower acyloxy radicals, mercapto lower alkyl radicals, lower dialkyl phospheno radicals etc.; a has a value of to 2, b has a value of 0 to 4, c has a value of 1 to 4 and d has a value of 5 to 500.

More specifically, R is a radical selected from the class consisting of lower alkyl radicals having one to 8 carbon atoms, e.g., methyl, ethyl, propyl, butyl, octyl, etc. radicals; cycloalkyl radicals having 5 to 7 carbon atoms in the ring, e.g., cyclopentyl, cyclohexyl, cycloheptyl, etc. radicals; mononuclear and binuclear aryl radicals, e.g., phenyl, tolyl, naphthyl, xylyl, biphenyl, etc. radicals; mononuclear aryl lower alkyl radicals, e.g., benzyl, phenylethyl, etc. radicals; and halogenated derivatives of the aforementioned radicals, e.g., chloromethyl, chlorophenyl, dibromophenyl, etc. radicals; R is a radical selected from the class consisting of hydrogen; lower alkyl radicals having one to 8 carbon atoms, e.g., methyl, ethyl, propyl, butyl, pentyl, heptyl, etc. radicals; cycloalkyl radicals having 5 to 7 carbon atoms in the ring, e.g., cyclopentyl, cyclohexyl, .cycloheptyl, etc. radicals; further radicals where tWo R' radicals attached to the same carbon atom taken together with the carbon atom to which they are attached, form a cycloalkyl radical having 5 to 7 carbon atoms in the ring, e.g, cyclopentyl, cyclohexyl, cyclohcptyl, etc. radicals, e.g., aminomethyl, aminoethyl, aminopropyl, aminobutyl, etc. radicals; and lower alkoxy radicals, e.g., methoxy, ethoxy, propoxy, butoxy, etc. radicals; X is a hydrolyzable radical selected from the class consisting of lower alkoxy radicals having one to 8 carbon atoms, e.g., methoXy, ethoXy, propoxy, etc. radicals; mononuclear aryloXy radicals, e.g., phenoxy, etc. radicals; lower dialkylamino radicals, e.g., dimethyl amino, diethyl amino, dipentyl amino, etc. radicals and lower dialkylaminoxy radicals, e.g., dimethylaminoxy, dibutylaminoxy, dihexylaminoxy radicals, etc. When Z is CN, X in addition to the above can also be a hydrolyzable radical selected from the class comprising halide radicals, e.g., fluoride, chloride or bromide radicals; isothiocyanato radicals; isonitrile radicals; oximo radicals; lower acyloxy radicals, e.g., acetoxy, etc. radicals; lower dialkylaminoxy radicals, e.g., dimethylaminoxy, dibutylaminoxy, dihexylaminoxy, etc. radicals; lower mercapto alkyl radicals, e.g., methylmercapto, pentylmercapto, octylmercapto, etc. radicals; and lower dialkylphospheno radicals, e.g., dimethylphospheno, diisobutylphospheno, diisoheptylphospheno, etc. radicals.

The prefix lower used above and later in the specification in modifying the radicals containing alkyl groups indicates that the alkyl groups contained on the radicals each have 8 or fewer carbon atoms.

Cyanoalkylesteralkylsilanes Within the scope of the present invention include, for example, compounds represented by the following formulas:

Aminoalkylesteralkylsillanes within the scope of the present invention include, for example, compounds represented by the following formulas:

Aminoalkylesteralkylsiloxy units which may be present on the siloxanes of the present invention include,

the formula,

R R aolt am.

is reacted with an alkylene cyanohydrin within the scope of the formula,

wil

Lt J.

in the presence of an esterification catalyst to produce a cyanoalkylesteralkylene within the scope of the formula,

iciltoltlz L151. L51.

The esterification catalyst used in the reaction is preferably toluene sulfonic acid, however, other esterification catalysts may also be used, such as HClO H 80 BF HF, AlCl etc. The cyanoalkylesteralkene is then reacted with a silane Within the scope of the formula,

in the presence of a platinum compound catalyst to produce a cyanoalkylesteralkyl silane of the formula,

Unsaturated carboxylic acids which can be employed in the above reaction include those having the formulas,

ll 11 II onporncmoon, CH2=OHCOH, orn=o-oon etc.

Alkylene cyanohydrins which can be employed in the above reactions include those having the formulas,

1 HOCH CHzCN, N0ooH, HOCHZCHZOHZCN etc. Cyanoalkylesteralkenes which. can be employed in the above reaction include those having the formulas,

etc. Cyanoalkylesteralkenes which. can be employed in include those having the formulas,

The platinum compound catalyst can be selected from that group of platinum compound catalysts which are operative to catalyze the addition of silicon hydrogen bonds across olefinic bonds. Among the many useful catalysts for this addition reaction are chloroplatinic acid as described in U.S. Pat. 2,823,218Speier et al., the reaction product of chloroplatinic acid with either an alcohol, an ether or an aldehyde as described in U.S. Pat. 3,220,972, Lamoreaux, trimethylplatinumiodide and hexyl-methyldiplatinum as described in U.S. Pat. 3,313,- 773Lamoreaux, the platinum-olefin complex catalysts as described in U.S. Pat. 3,159,601 and the platinum cyclopropane complex catalyst described in U.S. Pat. 3,159,- 662Ashby.

The SiH-olefin addition reaction may be run at room temperature or temperatures up to 200 C., depending upon catalyst concentration. The catalyst concentration can vary from 10 to 10* and preferably 10* to 10* mole of platinum as metal per mole of molecules containing olefinic unsaturation.

The nitrile radical can then be converted to an amine radical by hydrogenation. The hydrogenation is conducted at from 20 to 400 p.s.i. at 50 to 150 C. in the presence of a hydrogenation catalyst such as: nickel or cobalt.

The preferred conditions for the hydrogenation reaction are a pressure of 30 to 70 p.s.i., a temperature of to C., and the presence of a Raney nickel catalyst. The catalyst preferably contains no acidic impurities as these interfere with the reaction and cause the formation of undesirable by-products.

It was quite unexpected that the hydrogenation could be accomplished at 30 to 70 p.s.i. with little secondary or tertiary amine formation as the usual pressure conditions for this type of reaction are generally in the range of 1000 to 2000 p.s.i. and in the presence of NH The hydrogenation step is represented by the following general equation:

The following examples are illustrative of the polysiloxanes prepared according to the practice of my invention and are not intended for purposes of limitation. All parts are by weight.

The catalyst which was used in SiH-olefin addition reactions in the following examples was a platinum coordinate catalyst formed by the reaction of chloroplatinic acid and octyl alcohol. The preparation of the catalyst solution is disclosed in Example 1 of U.S. Pat. 3,220,- 972-Lamoreaux. Chemical analysis of this solution showed it to contain 3.5 atoms of chlorine per atom of platinum and 0.035 gram of platinum per gram of solution. In the following examples, unless otherwise indicated, all parts are by weight.

EXAMPLE 1 Cyanoethyl trimethoxysilylbutyrate A reaction mixture consisting of 177.5 parts of ethylene cyanohydrin, 215 parts of vinyl acetic acid, 19.7 parts of p-toluene sulfonic acid, and 350 parts of xylene was brought to reflux. The water produced by esterification was azeotropically removed by means of a Dean-Stark trap. The reaction mixture was homogeneous at this state. After a period of 5 hours, 43 parts of water was collected by means of the Dean-Stark trap. Further heating failed to increase the volume of collected water. The acid catalyst, p-toluene sulfonic acid, was then separated from the reaction mixture by filtration. The remaining liquid was then fractionated at reduced pressure. Upon removal of the xylene, the product distilled over at 75 C., at 0.4 mm. Hg. A total of 253 parts of cyanoethyl vinylacetate having the formula was obtained. To the 253 parts of cyanoethyl vinylacetate was added sufiicient platinum coordinate catalyst solution to give an over-all platinum concentration of mole of platinum per mole of olefin present. The reaction mixture was then brought to 90 C. and the drop-wise addition of 222 parts of trimethoxysilane was started. A very exothermic reaction occurred. The external heat source was removed and the reaction temperature was kept at l30il0 C. by adjusting the rate of silane addition. A total of twelve hours was required for complete silane addition, then the reaction was maintained at 120 C. by application of external heat for an additional 2 hours to insure complete reaction. The reaction product was fractionated and the main product, cyanoethyl trimethoxysilylbutyrate of the formula distilled over at 139 C. at 0.4 mm. Hg. The amount of product obtained was 420 grams. Its purity by vapor phase chromatographic analysis was better than 99%.

EXAMPLE 2 Aminopropyl trimethoxysilylbutyrate Into a pressure bottle was placed 120 parts of cyanoethyl trimethoxysilylbutyrate and parts of Raney nickel catalyst. The bottle was placed in a Parr hydrogenator and pressured with hydrogen to 55 p.s.i. Shaking was :started as the reaction mixture was heated to 80 C. When the pressure dropped to p.s.i., additional hydrogen gas was introduced to bring the pressure back to 55 p.s.i. This hydrogen addition procedure was repeated as required. After a time interval of 7 hours, additional hydrogen was not required to maintain a 55 p.s.i. pressure. The pressure on the system was released and a dark reddish brown liquid decanted from the catalyst. On distillation, a total of parts of aminopropyltrimethoxysilylbutyrate of the formula was obtained by having a boiling point of 95 to 97 at 0.3 mm. Hg which represented about a 32% yield. An

8 IR scan of the distilled product showed the -NH absorption at 3.2 microns and 6.5 microns, the

absorption at 5.8 microns and the OCH at 3.55 microns, 8.5 microns, and 9.3 microns, typical of the proposed structure. There was no indication of nitrile absorption indicating completeness of the reaction.

EXAMPLE 3 Detergent resistant polish A detergent resistant polish was made by first forming a mixture of one part of aminopropyltrimethoxysilylbutyrate, 1.5 parts of a silanol chain-stopped polydimethylsiloxane having the formula OH; HO iO 31H.

2 parts of a trimethylsilyl end-stopped polydimethylsiloxane oil having a viscosity of 10,000 centistokes at 25 C., 2 parts of a sorbitan monooleate emulsifier, 0.2 part of a polyoxyethylene sorbitan monooleate emulsifier, 20 parts mineral spirits, and 15 parts kerosene. After these components were thoroughly mixed, 50.3 parts of water was added with high shear agitation to form an emulsion. To this emulsion was then added 8.0 parts of aluminum silicate to produce a combination cleaner polish emulsion. The polish formed was applied to an automobile. The polish had good rub-out and depth of gloss. The automobile was driven through the entire term of an upstate New York winter, which resulted in the automobile being salt encrusted quite frequently. During the course of the winter, the automobile was given 15 detergent washes. The film formed by the detergent resistant polish showed but slight damage the following spring.

EXAMPLE 4 Preparation of cyanoethyl methyldichlorosilylbutyrate A reaction mixture containing 139 parts of cyanoethyl vinylacetic acid having a platinum concentration of 10 mole Pt/mole olefin present is heated to C. To the mixture is added dropwise parts of methyldichlorosilane. A very exothermic reaction occurs. The reaction temperature is maintained at 110120 C. by rate of silane addition. Following complete addition, the reaction is kept at C. by application of external heat. A VPC scan of the reaction at this stage shows the presence of a high boiling adduct. Upon fractionation the product distills over and IR and hydrolyzable chloride confirm the product identity as cyanoethyl methyldichlorosilylbutyrate of the formula:

Cl C HaS iOHzCHzC H2(JOC H2C H2C N EXAMPLE 5 Preparation of cyanoethyl triniethoxysilylmethacrylate A mixture containing 140' parts of cyanoethyl methacrylate having a platinum concentration of 10* mole Pt/rnole olefin is heated to 120 C. To the mixture is added dropwise 133 parts of trichlorosilane. A vigorous exotherm develops. The reaction temperature is maintained at 115130 C. by rate of silane addition. After eight hours of silane addition, the heat generated by the reaction is no longer sufficient to maintain the desired temperature, and external heat is applied to attain a temperature in the order of 110l30. After complete addition, which requires a total of 12 hours, the reaction is kept at for an additional 4 hours. Upon fractionation, the product is obtained as a colorless liquid and its structure is confirmed by NMR, IR and hydrolyzable chloride analysis as cyanoethyl trichlorosilylmethacrylate of the formula:

tural unit:

R R LBJ. LBJ. recurring and intercondensed with siloxane blocks having the average formula:

RI! ita Ltd.

where Z is selected from the class consisting of radicals and ON radicals, R is selected from the class consisting of lower alkyl radicals having one to 8 carbon atoms, cycloalkyl radicals having 5 to 7 carbon atoms in this ring, mononuclear and binuclear aryl radicals and when Z is CN, R can also be selected from the class consisting of halogenated derivatives of the R radicals defined above; R is a radical selected from the class consisting of hydrogen, lower alkyl radicals, cycloalkyl radicals having 5 to 7 carbon atoms in the ring, further radicals where two R radicals attached to the same carbon atoms, taken together with the carbon atom to which they are attached, form a cycloalkyl radical having 5 to 7 carbon atoms in the ring and when Z is CN, R can also be selected from the class consisting of halogenated derivatives of the above defined organic R radicals; R is selected from the class consisting of lower alkyl radicals, cycloalkyl radicals containing from 5 to 7 carbon atoms in. the ring, lower alkenyl radicals, mono and binuclear aryl radicals, mononuclear aryl lower alkyl radicals, lower cyanoalkyl radicals, lower aminoalkyl radicals, lower alkoxy radicals, hydrogen and when Z is CN, R" can also be selected from the class consisting of halogenated derivatives of the hydrocarbon R" radicals defined above; a has a value of 0 to 2, b has a value of zero to 4, c has a value of one to 4, and d has a value of 5 to 500.

2. An organopolysiloxane of terized by R being hydrogen.

3. The composition of claim 1. further characterized by R being a methyl radical.

4. The composition of claim by R" being a methyl radical.

5. The composition of claim by R being a methyl radical, R being a methyl radical.

6. The composition of claim 1. further characterized by I; having a value of one, and 0 having a value of 3.

7. The composition of claim 1 further characterized by R being a methyl radical, R being hydrogen, R being a methyl radical, b having a value of one, and 0 having a value of 3.

8. The composition of claim 1 further characterized by a having a value of 0.

9. The composition of claim 1. further characterized by R being a methyl radical, R being hydrogen, R" being a methyl radical, a having a value of 0, b having a value of one, and c having a value of 3.

10. An organopolysiloxane within the scope of claim 1 wherein Z is NH claim 1 further charac- 1. further characterized 1 further characterized being hydrogen, and R References Cited UNITED STATES PATENTS 3,033,815 5/1962 Pike et al 260--46.5 3,168,544 2/1965 Jex 260-448.2

DONALD E. CZAJA, Primary Examiner M. I. MARQUIS, Assistant Examiner US. Cl. X.R.. 

